Improvement in millstone-drivers



J. J. I'OMLINSON'. Millsfone Driver.

gNO. 111,277. Patented Jan. 24,21*@71.

fER/ff runner.

UNITED STATESv PATENT CFFIGE.

JOHN J. TOMLINSON, OF BOZEMAN CITY, MONTANA TERRITORY.

IMPROVEMENT IN MILLSTONE-DRIVERS.

Specification forming part of Letters Patent No. 1l 1,277, dated January24, 1871,

To all whom it may concern:

Be it known that I, JOHN J. ToMLINsoN, of Bozeman City, in the county ofGallatin and Territory of Montana, have invented a new and usefulImprovement in Millstone-Drivers and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to make and use the same, referencebeing had to the accompanying drawing, forming part of this specication.

This invention relates to a new and useful improvement in drivers formillstones, by means of which the running stone adjusts itself to thebed-stone and to the resistance when the latter (or bed-stone) is out oflevel, or when the spindle is out of train or varies from a lineperpendicular with the face of the bed, as will be hereinafter morefully described and the invention consists in the construction andarrangement hereinafter generally described, and specifically stated inthe claims.

In the accompanying drawing, Figure l represents a vertical section ofFig. 2 on the line w a', showing the spindle and driver and the runnerand bedstone. Fig. 2 is a view of the running stone, with the driver inplace. Fig. 3 is a view of a self-adjusting driver made withpivot-bearin gs.

Similar letters of reference indicate corresponding parts.

A is the bed-stone. B is the running stone. C is the spindle. D is thebail. E is the inner driver, which is keyed or fastened to the spindlein the usual manner. F is the outer driver, the two arms Gr G Ot' whichdrive the These arms rest in recesses in the stone, and are allowedlateral play, as seen in the drawing. The ends of the arms are providedwith friction-rolls H H. By means of this lateral play the stone is adjusted in one direction, and the resistance equalized on the ends of thedriver.

The adjustment in the other direction is provided for by the mode ofuniting the inner to the outer driver. 'This is done by two links, I I,by means of which the inner driver, E, is allowed a longitudinalmovement within the outer driver, F. This arrangement is plainly seen inFig. 2.

The innerdriver, E, may be provided with pivots, as seen in Fig. 3, at JJ, which will allow the ruimer to slightly rock and adjust itselfvertically.

With the runner balanced on the cock-head of the spindle and a rigiddriver it is nearly impossible to bring an equal amount of resistance onthe two ends of the driver. By the play provided for in my arrangementno difficulty is experienced.

K represents a cone or frustum of a cone of sheet metal, which fits intothe eye of the stone and partially covers the driver, the object beingto properly distribute the feed.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In combination with the running stone of agrinding-mill, a driver composed of the parts E and F, connectedtogether and with the runner, substantiallyas shown and described, andfor the purposes set forth.

2. Making provision for lateral play in a mill-driver, substantially asaud for the purpose shown in Fig. 2, and herein described.

3. The arms Gr G of the driver F, provided with friction-rollers H H,and fitted loosely in recesses in the runner, as shown and described, toprovide for lateral play, as set forth.

4. The inner driver, E, outer driver, F G, provided with rollers H, andthe links I I, arranged with reference to the spindle and runner, asshown and described.

JOHN J. TOMLINSON.

Witnesses:

J. C. GUY, WALTER COOPER.

